Friction shock-absorbing mechanism



Reb. 2 1926, 571,682

J. F". OCONNOR FRIcTxoN suocx ABsoRBINe vMEHANIsM Filed Sept. 16, 1;322 s Sheets-sheet 2 ng; i l f5 il??? /f l 4f', V lV/Z/ mut?,

Feb. 2 1926.

VJ. F. OCONNOR FRICTION SHOCK ABSO-RBING MECHANISM Filed Sept. 16, 1922 3 Sheets-Sheet' 5 N www 5% \N\ www u S. SQ MKS @W m xm@ 2i 4% A\\\ Nm .nv f I m ,n Mw /w/fN/j mww um n ,A A S f// m Ml I r.. vm Sm l RN, Q \m\\\\\ 7 Si f in m mmm F. wbmqwm,

n'zmsversm ,vertical sectioned View, substani vfzw msnm-MENTS, To

fears was i8 of the from and mail' fnower Owings A co-act respecuivey with @he 'front esta; lugs U. and the rear stop lugs 12. Each of the, nlowe' casmqs A. is provided with tm' may wa thereof. The abutments 1.9 are 3f genmay leeanfmlar outline being sm'ewhat gieae' in Wldth than in height and om means orsust'aining the Wedge bocks G. A@ Win be seen upon lfemnceko Fig. each abutment 19 located cntmly of the v7.11. 18 the casing A.. and is spaced 'from "the side Wals 17, 'thereby providing imc-asses 20 for receiving the ends m. this frction plates B. Egal'. yf the casngs A. :is

p1-@vided with means for holding, th plates cnnnectafl herewth, Said means comprismg 2l projecting upwardly, and.Y down- 'Wafsdjf ifi-0m @ne lowar and upper Wi-.Hs 16,

. shown,f the c@ cop pria@ thm@ 26. ik@ platea "7M 'and Q6 being alternated, with a plate 25 of 21 of the casings A to thereby connect the lates with the casings so that the same will lie moved outwardly therewith when the casings are relatively moved. As clearly shown in Figure 4, the recesses 2T are'Y slightly larger than the ribs 2l, there being suilicient play to permit a slight relative movement of the followers andl plates, 'lfhe plates 25 and 26 have the ends opposite to those connected to the casings A )iuovided with upper and lower cut-out portions 28,'

as shown in Fig.v 4, thereby providing the same with a narrow extension 29 ot a width adapted to pass between the upper and lowei` faces of the ribs 21 so that the ends ot the plates may closely approach` the end walls 18 of the casings. In this connection, it should be noted that the plates Q5 and 26 are ot' such a length and have their` ends 29 so spaced'from the Walls 18 in the normal position of the parts that this spacing will be greater than the space between the ends 30 of the walls 17 of the casings A. By this arrangement the end walls Btl of the casings A will abut before the ends Q9 of the pilates contact with the Walls 18, thereby causing the casings A to receive the full. load when the shock absorbing mechanism has been completely compressed.

Arranged between the two groups ot friction plates .l and in contact with the innermost plates 26 thereof, are two sin'iilar op- 'ositely arranged tapering friction elements lll. As shown in Fig. 5, each ot the tapering friction elements E comprises a rectanguiar plate 31 provided with a vertically eX- tending centrally located, inwardly projecting web 32. As shown in Fig. 1, the web 82 ot each plate is of such a width that when the parts are assembled, a space will be left between the adjacent ends ot the webs to accommodate a longitudinally extend-ing retaining bolt tt. '.l`he outer face 35 ot the plate 3l of the tapering @lenient ll extends parallel to the longil udinal axis of the shock absorbing mechanism` and inner 'tzu-e of the wall 3l is opposilely inclined outwardly 'from the central rib 32 toward the opposite ends ot the plate E, as indicated by 134, thus providing oppositely extending faces slightly outwardl \v inclined with reference to the longitudinal axis ot the shock absorbJ king mechanism. Upon reference to Fig. 3,

it will be seen that the plates E are of a height equal to the height of the friction plates 25 and 26.

The wedges C are arranged at, opposite .ends ot the shock absorbing mechanism and and the inner inclined faces ot' the tapering plates itl- 143, is a pair of wedge shoes D. Each of the wedge` shoes D has an inclined wedge acting face 38 co-actii'ig with the corresponding wedge face' 3G of the wedge block C and an outer wedge face 39 co-acting with the inclined inner face 134 of the tapering plate E. Upon reference to Fig. 1, it willI be seen that. the wedge shoes are thus prorided with solid end portions of triangular shape in moss-section. The wedge shoes have their inner rear 'ends recessed as shown at 40 to provide abutinents 41 to receive the rear ends of the. springs.

Interpol-:ed between the wedge blochs CA The spring resistance F comprises tandem arranged outer relatively heavy springs 4t2-42 and tandem larranged relatively lighter inner springs {t3-#13. The springs 42 and 43 are interposed between the webs 32 on the tapering plates E and the abut.- ments 41 on the wedge shoes, thus holding the wedge shoes in contact withthe wedge blocks C.

The easlngs A are perforated as shown at 44 to provide for the insertion of the retaining bolt 34 which passes through apertures 45 in the abutment. 19, apertures 38 in the wedgo blocks C and through the inner spring coils 43. The lbolt 34 has its head 1n contact with the innei` wall of one of the hollow abutments 19iand the nut thereof in contact with the inner lWall of the other hollow abutment 19, thereby retainingthe parts o'l the draft rigging in assembled relation. It desired, the springs 42 and 43 I may be held under a slight compression by the retaining bolt 34, thus compensating for the rear follower during buff. thewedges C will cause the wedgeshoes D, opposed by the springs 42 and 43, to move laterally thereby putting-the friction plates and the tapering plates under-pressure, augmenting a hailing action, the wedges C will cause the scelgo shoes to i'nove apart in a similar inanner to that. described in connection with the preferred construction, causing pressure to 'be applied to the groups of friction plates at opposite ends of the mechanism. It

ishould also be'noted tliat there will be an .ddit-ional inward movement of the shoes D snmlar to the movement of the shoes D,

' (lne to the wedg'ing action between the shoes and the taperina plates, thereby causing an additionalJ longitudinal movement of-the shoes D relatively to the plates ll, 'and further compression'of the spring resistance and an increase in wedgriniif pressure. The plate G', which carries the friction platesl 126 and. the tapering plates E', is in the nature of a floating member .being held between the springs 142 and being;r moved during the compression o f the same a distance approximately`\ one-half of the distance that the front follower A moves due to the combined action of the springs and the friction created between plates 126 and the groups of plates 125 carried by the front and rear followers. As the wedging pressure is vsnbstantially equal at opposite ends of the mechanism the opposition to movement of the plates 126 due to frietional contact with Ithe plates 125 of 'the rear follower is substantially equal to the force tendine; to move the plates 126 due to ifrietional contact with the plates 125 of the front follower. s the plates 126 are thus held against full movement; with the front follower A, it will be obvious that the plates 125 which are 'moving with the front follower will be moved relatively to the plates lQlS, and that the plates 126, on account'of tlicir'morement with the floating member` G will be moved relatively to the platesd connected lo the roar follower A. lt will thus be seen that Vl'riciional resistance is set up between the plates 19.5 of the front 'follower moving' relatively to the plates 126. and the plates '126 i'novingr relatively to the plates l'li ol' thi.x rear follower. ln release7 tho operation of the mechanism will he substantially the same as is the case in the pre-referred embodiment.

I have herein shown and described what vl now consider the preferred manner of carrying out my invention, but the same is merely illustrative and l contemplate all changes and modifications that come within the scope of the claims appended hereto.

claim:

l. ln a friction shock absorbing mechanism; the combination with a pluralit of groups of intercalated friction plates; ront and rear followers-fon relatively moving said plates; a spring resistance between said groups of plates; a tapered friction element interposed between each group of plates and the s ring resistance and adapted to be move by said spring resistance; and means for .placing said plates under lateral pressure, said means including wedging means at opposite ends of said spring resistance cil-acting with said elements, each of said wcdgin means being interposed between a follower and thev adjacent end of the spring resistance whereby said intercalated plates are subjected to wedging pressure during the compressive action of the mechanism.

2. ln a friction shock absorbing mechanism; the combination with a front and a rear follower; of a plurality of groups of relatively movable plates between said followers; means opposing lateral movement of said groups of plates; a longitudinally extending spring resistance arranged between said groups of plate-s; a tapered friction element between ea rh grot-ig of'plates and the spring resistance, each` of said elements being` provided with means for engagingjhe spring resistance, whereby the elemcntiis adapted to be moved with said spring resistance; and wedge-acting means between each follower andthe adjacent end of the spring resistance for creating pressure on said elements and `groups of plates during the compressive action of tne mechanism. 3

ln alfriction shock absorbingimech'anism, thecon'ibination with a plurality of groups of intercalatcd friction platos; of 'a spring resistance arranged between. said groups of plates; a floating tapered friction element between each group of friction plates and the spring; resistance, each of said elements being provided with means for engaging the spring resistance;I means for limiting lateral movement of said plates; and wedge-pressure-transmitting means at opposite ends of said springr rcsistanceand ico-acting with said elements to put the groups of plates and the elements under pressure daring.,Y the compressive action of the shock absorbing mechanism.

4;. ln a friction shock absorbing mechanism; the combination with front and rear followers; of a spring resistance between said followers. said sprinpr resistance comprising spring eli-ments arranged in tandem; wedge-pressure transmittingr means at oppointercalated frictionv nevi site ends of said spring resistenee, interposed between the same. and thev adjacent i'ollower; groups of interealnted'friction plates on opposite sides otsnid spring resistance; means opposing interni outward movement 3i said groupsof plates; and e iosting Wedge elenlent interposed between seid spring sistenee and a group of plates, seid element having a portion reeeived between said 'tan dem arranged springs.

5. In a friction shock absorbing ineelio nism; the combination with e plurality of friction elements; of front and fol lowers, having means thereon liinfl .inglst eral movement of said elements; n spring' resistanoe associated with said elements, seid spring resistance comprising tandem arranged springs; nbiitinent means rigidly connected with each of seid elements :1nd interposed between Said tandem arranged springs; wedgeeoting means at opposite ends of snidspring resistance 3o-acting with seid elements sind followers.

6.111 n friction slioek absorbing meebenism; the combination with front und rear follower eesings; of oppositely arranged sets of friet-ion plates carried by eeen 'follower, seid plates beingeinlnneed by said easing and held against lateral movement thereb f, the sets of plates 1connected with one fo lower beingr movable relatively to the' sets ,of plates carried by the other follower; n spring resistance' between said sets of plates, seid spring resistance eolnprising tandem arranged springs; friction elements 2o-acting with said sets of' plates, seid frietion elements eneli including abutment ineens and said abutment ineens being interu posed between said tandem arranged springs; and wedge-noting means arranged st opposite `ends of said spring resistance eoaeting with said followers und said friction elements. 1

7. In a, friction shock absorbing meelni" nis1n,tl1e combination with front. and rear follower easings; of oppositeiy arranged sets of friction lotes liousedwitliin and carried by said fol ovver easings and engaging the interior surfaces tbereoithesets of plates carried vby one follower being movable relstively to the sets of platesjcnrried by tbe other follower; a. spring resistance between seid sets of plates, said spring resistance comprising tandem arranged springs; frion tion wedge elements eri-acting with 'sind sets of plates, said elements each including :in

abutment member ond said member being Linn M -Anielgeneting ineens inelndinf n Wedgebloek engaging one olseid followen` und Wedgeslioes interposed between said bleek and said elements g 3. ln n` friction shock absorbing' meehe- -nism; tlie combination with 'front and rear follower casinos; of oppositely arranged sets of friction Aplates housed Within and carried by snid irllovver onsings, seid pistes being bold "genot lateral outward movement by said easings; tbe sets of plates carried b one folio-wer beingir movable relatively to the sets of plates carried by tlie other follower; e.. spring resistance between said sets of plates, seid spring resistance comprising j tandem arranged springs; friction Wedge elements fre-noting with said sets otplates,

said elements enen includingan abutment' member and seid abutmentniember beine' interposed between said tandem arranged springs; lfind Wedge-neting'nienns at oppo-' site ends of seid spring resistance, eo-ncting with seid followers and elements, encli wedge-noting means including e Wedge' block having opposite Wedgevnees and e wedge shoev interposed between eneli Wedge face and tbe ndjincentiwedge element.

9. In n friction shock absorbing mechanism, the combination with oppositely :1r-

rang'ed hollow end follower casings nor-v mally spaced and adapted to nieve relatively toward and lfrom each other; of longitudinally arranged spring ineens disposed centrally and substantially housed by seid follower ensings, ssid'plntes beinglimited against lateral outward movementby seid cnsnigs; longitudinally arranged 'friction plates adaptedV for relitti-ve movement upon relative movement of the follower essings, said plates being-divided .into tivo groups on oiposite sides of seid springresistanee; dup ioete'sets of wedge-friction elements at each end o tbe spring' resistance; und fric tion means interposed bet-Ween each group oi plates sndtbe end sets of Wedge-friction elements, said Wedge elements linving fric tion insee inclined at :in angle relatively sente with respect vto the iii-iis of the nieeliw nlsin.

.ln witness that I-elaim tlie'foregoinfr I, lieve hereunto subscribed my name this 2 tbdiiy of Ang. 192% J'lllil li. OCONNR. 

